158985 ÷ 23 
The aim is to understand the frequency of 23 in 158985.

On to step 1:
23 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 23

Moving on to step 2:
If we divide 15 by 23, we get 0 and a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Grab the next digit (8) from the dividend, add it to 15, then carry on: 158 / 23

On to step 3:
23 can be fit into 158 6 times, resulting in a remainder of 20.
The next digit of our result is 6. 
Result so far: 6.0
Subtracting 138 from 158 leaves us with 20.
Append the next digit (9) from the dividend to 20 and continue with: 209 / 23

Going ahead to step 4:
209 divided by 23 is 9 with a remainder of 2.
The next digit of our result is 9. 
Result so far: 69.0
Deduct 207 from 209 and we're left with 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 23

On to step 5:
23 can be fit into 28 1 times, resulting in a remainder of 5.
The next digit of our result is 1. 
Result so far: 691.0
Subtracting 23 from 28 leaves us with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 23

Step 6:
55 divided by 23 is 2 with a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 6912.0
Deduct 46 from 55 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
90 divided by 23 is 3 with a remainder of 21.
Put 3 as the next digit of the answer. 
Result so far: 6912.3
Deduct 69 from 90 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 8:
The number 23 fits into 210 9 times, leaving a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 6912.39
If we subtract 207 from 210, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 9:
The number 23 fits into 30 1 times, leaving a remainder of 7.
The next digit of our result is 1. 
Result so far: 6912.391
If we take 23 away from 30, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 10:
70 divided by 23 is 3 with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 6912.3913
If we subtract 69 from 70, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 11:
23 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 6912.3913
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 12:
When dividing 100 by 23, we get 4 with a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 6912.391304
Subtract 92 from 100 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 13:
23 goes into 80 3 times with a remainder of 11.
The next digit of our result is 3. 
Result so far: 6912.3913043
The remainder is 11 after subtracting 69 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 14:
23 can be fit into 110 4 times, resulting in a remainder of 18.
The next digit of our result is 4. 
Result so far: 6912.39130434
If we take 92 away from 110, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

After the division, we end up with 6912.39130434 and a remainder of 1.8e-08.